$BTC Bitcoin ($BTC) is the first and most well-known cryptocurrency, created in 2009 by the pseudonymous Satoshi Nakamoto. It operates on a decentralized blockchain network, enabling peer-to-peer transactions without intermediaries like banks. With a fixed supply of 21 million coins, Bitcoin is often referred to as “digital gold” due to its scarcity and store-of-value characteristics. It’s widely used as a hedge against inflation and a speculative investment. In 2025, Bitcoin surpassed $100,000, reflecting growing institutional interest and adoption. It plays a central role in the crypto ecosystem, influencing market trends and driving innovation in decentralized finance and blockchain technologies.